bisecting fixing commit since 47cbf4cc32db62f053c4cd04fc6ee39a0218139e
building syzkaller on 99917735b6a974a09d3833c34b3d4a8b8198522d
testing commit 47cbf4cc32db62f053c4cd04fc6ee39a0218139e
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 22605aef06e70cb2668f976292867aef8ebc882af54dea760ad0b0a9af44a982
all runs: crashed: possible deadlock in mnt_want_write
testing current HEAD f6b016a9d961296d2db609d0259654371625e22e
testing commit f6b016a9d961296d2db609d0259654371625e22e
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 5bb7f04270138c71b7ec98614cf45c073c1ed78b0ca80296e7d0f31ad84fefc5
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 23m7.767226009s (build: 16m3.603204692s, test: 6m32.815381011s)
the crash still happens on HEAD
commit msg: Linux 4.14.251
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout